首页|基于下垫面结构的喀斯特地区洪涝演化特征研究

基于下垫面结构的喀斯特地区洪涝演化特征研究

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
为探究不同下垫面结构下喀斯特地区的洪涝演化特征,基于贵州省1980～2020 年降雨数据计算降水Z指数,利用系统聚类法划分贵州省下垫面结构,分析其洪涝时空演化特征,并探讨下垫面主导影响因子.结果表明:① 贵州省下垫面可划分为深切割岩溶较强发育谷地区、浅切割岩溶中等发育谷地区、深切割非岩溶洼地区、浅切割岩溶强烈发育谷地区.②1980～2020 年贵州省呈变涝趋势,大涝发生次数较多;空间上整体呈东南高、西北低的分布格局,以大涝、重涝偏多,但各亚区空间分布特征不同.③ 不同下垫面条件对洪涝影响由大到小依次为地形地貌>岩溶发育强度>地表切割深度;各级洪涝在不同下垫面条件下均出现概率性转移,转移现象较活跃.研究成果可为喀斯特流域防洪减灾提供参考.
Characteristics of flood evolution in karst area based on underlying surface structure
To investigate the characteristics of flood evolution in karst area under different underlying surface structure,based on the rainfall data of Guizhou Province from 1980 to 2020,a Z-index of precipitation was calculated,and the underlying surface structure of Guizhou Province was divided by using the systematic clustering method.The spatial and temporal evolution character-istics of flood and waterlogging were analyzed,and the dominant influencing factors of the underlying surface were discussed.The results showed that:① The underlying surface of Guizhou Province can be divided into deep-cutting karst strong development valley area,shallow-cutting karst medium development valley area,deep-cutting non-karst depression area,and shallow-cut-ting karst strong development valley area.② The flood in Guizhou Province showed a trend of more waterlogging from 1980 to 2020,with large floods occurring more;the spatial distribution pattern of the Z-index was high in the southeast and low in the northwest,with more large floods and severe floods,but the spatial distribution characteristics of the subregions were different.③The influence of each underlying surface condition on the flood was sequenced as topography and landform>karst development in-tensity>surface cutting depth.All levels of flood showed probabilistic transfer under different underlying surface structures,and the transfer phenomenon was active.The results of the study can provide a scientific basis for flood prevention and disaster mitiga-tion in karst basins.

flood evolutionZ-indexunderlying surface structureMorlet wavelettransfer probability matrixGuizhou Provincekarst watershed

谭红梅、贺中华、顾小林、许明金、王茂强、杨树平

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贵州师范大学地理与环境科学学院,贵州贵阳 550001

贵州省山地资源与环境遥感应用重点实验室,贵州 贵阳 550001

贵州省水文水资源局,贵州 贵阳 550002

洪涝演化 Z指数 下垫面结构 Morlet小波 状态转移概率矩阵 贵州省 喀斯特流域

贵州省水利厅自然科学研究项目国家自然科学基金国家自然科学基金

KT202237U161244141471032

2024

10.16232/j.cnki.1001-4179.2024.05.005

人民长江
水利部长江水利委员会

人民长江

CSTPCD北大核心
影响因子：0.451
ISSN：1001-4179
年,卷(期)：2024.55(5)
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